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Human chorionic gonadotropin is a glycoprotein composed of 237 amino acids with a molecular mass of 36.7 kDa, approximately 14.5kDa αhCG and 22.2kDa βhCG. [4]It is heterodimeric, with an α (alpha) subunit identical to that of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), and a β (beta) subunit that is unique to hCG.
It is important to note here that the whole hCG protein hormone is a heterodimer, with an alpha and a beta subunit. The alpha subunit is identical in the hCG protein hormone, the Luteinizing Hormone (LH), the Follicle Stimulating Hormone (FSH), and the Thyroid Stimulating Hormone (TSH). It is specifically the beta subunit for each of these ...
However, the hCG beta subunit contains an additional 24 amino acids, and the two hormones differ in the composition of their sugar moieties. The different composition of these oligosaccharides affects bioactivity and speed of degradation. The biologic half-life of LH is 20 minutes, shorter than that of FSH (3–4 hours) and hCG (24 hours).
The presence of hCG in a woman's body indicates that a fertilized egg has implanted in the uterus and the placenta has started to form. 10 days after fertilization, significant hCG can be detected from woman's blood sample. [6] The levels of hCG in the body increase rapidly in the first few weeks of pregnancy, doubling every 48–72 hours. [7]
3973 16867 Ensembl ENSG00000138039 ENSMUSG00000024107 UniProt P22888 P30730 RefSeq (mRNA) NM_000233 NM_013582 NM_001364898 RefSeq (protein) NP_000224 NP_038610 NP_001351827 Location (UCSC) Chr 2: 48.69 – 48.76 Mb Chr 17: 89.02 – 89.1 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The luteinizing hormone/choriogonadotropin receptor (LHCGR), also lutropin/choriogonadotropin ...
Hypergonadotropic hypogonadism (HH), also known as primary or peripheral/gonadal hypogonadism or primary gonadal failure, is a condition which is characterized by hypogonadism which is due to an impaired response of the gonads to the gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), and in turn a lack of sex steroid production. [1]
Its structure is similar to those of luteinizing hormone (LH), thyroid-stimulating hormone (TSH), and human chorionic gonadotropin (hCG). The alpha subunits of the glycoproteins LH, FSH, TSH, and hCG are identical and consist of 96 amino acids, while the beta subunits vary. [4] [5] Both subunits are required for biological activity.
Human placental lactogen (hPL), also called human chorionic somatomammotropin (hCS) or human chorionic somatotropin, is a polypeptide placental hormone, the human form of placental lactogen (chorionic somatomammotropin).
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